body,html{
    margin: 0;
    padding: 0;
}
body,html,#app{
    height: 100%;
    background-color: #f5f5f5;
}
li{
    list-style-type: none;
}
a{
    color: #333;
    text-decoration: none;
}
textarea,button{
    border: 0;
    outline: none;
}
input{
    margin: 0;
}